Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Revenues	$ 12,629	$ 11,782	$ 38,883	$ 31,068
Cost of revenues	1,326	1,011	3,767	2,902
Gross profit	11,303	10,771	35,116	28,166
Operating expenses:
Selling and marketing	2,655	1,793	8,049	5,529
Research and development	5,446	3,063	13,774	8,487
General and administrative	2,997	2,396	9,741	7,522
Restructuring expense	9	39	19	154
Total operating expenses	11,107	7,291	31,583	21,692
Operating income	196	3,480	3,533	6,474
Other income (expense):
Interest income, net	7	87	94	117
Gain on sale of software product				483
Other expense	3		3	(15)
Income before provision for income taxes	206	3,567	3,630	7,059
Provision for income tax expense	45	0	45	8
Net income	$ 161	$ 3,567	$ 3,585	$ 7,051
Earnings per share:
Basic	$ 0.00	$ 0.10	$ 0.09	$ 0.21
Diluted	$ 0.00	$ 0.09	$ 0.08	$ 0.20
Weighted average shares outstanding:
Basic	41,351	36,094	40,656	33,170
Diluted	43,026	39,472	42,577	35,287
Preferred dividends per share		$ 70.50		$ 104.58